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Implementation & Configuration Flashcards

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  1. Which Fabric tool generates the genesis block and channel creation transactions from configtx.yaml?

    Answer: configtxgen

    configtxgen reads configtx.yaml profiles and outputs genesis blocks, channel transactions, and anchor peer updates.

  2. What is cryptogen primarily intended for?

    Answer: Generating crypto material for development and testing networks

    cryptogen creates static certificates and keys for test networks, while production should use a Fabric CA or enterprise CA.

  3. Which file configures a Fabric peer's runtime settings such as ledger, gossip, and chaincode options?

    Answer: core.yaml

    core.yaml holds peer configuration and can be overridden by CORE_* environment variables.

  4. What is the purpose of anchor peers in a channel?

    Answer: They enable gossip discovery across organizations

    Anchor peers let peers from different organizations discover each other for cross-org gossip communication.

  5. In the Fabric 2.x chaincode lifecycle, what is the correct order of operations?

    Answer: Package, install, approve, commit

    A chaincode is packaged, installed on peers, approved by organizations, then committed to the channel definition.

  6. Which environment variable setting switches a peer's state database to CouchDB?

    Answer: CORE_LEDGER_STATE_STATEDATABASE=CouchDB

    CORE_LEDGER_STATE_STATEDATABASE overrides ledger.state.stateDatabase in core.yaml.

  7. What is the default lifecycle endorsement policy in Fabric 2.x channels?

    Answer: A majority of channel organizations

    The default LifecycleEndorsement and Endorsement policies use MAJORITY Endorsement of channel organizations.

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Sources & references

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  1. blockchaintrainingalliance.com — Test delivery, passing score, score release, test dates, fees, exam format, time limit · verified Oct 2026